Smaller tire?

[Elrey7698]

Do any of you know what is the smallest profile tire that can be put on the 17" spare steel rim? I have 2 steel rims and i want to put a smaller tire than the 265 70r17.

 

[Elrey7698]

Anyone? I need to know by sunday..im putting them on my yukon..just for a burnout contest. Only for that day..dont wanna waste my brand new tires and i dont wanna stress my truck burning my A/T's